0 1 2 3 4 5 6 7 8 9 .
+ - * / ^
( ) [ ] = x y $\pi$ e
$\sqrt{}$ sin cos tan cot ln exp asin acos atan
BckSp         Clear
Enter your data into the calculator and click Submit. You can also change the type of the calculator in the second row of the menu.
The calculators are divided into several groups, the description is available if you move your mouse on the name of each group (the first row of the menu).
Derivative and partial derivative
f=
automatically use linearity of derivative
automatically differentiate constants

The type of the derivative Ordinary derivative (function in one variable)
Partial derivative with respect to x (function in two variables)
Partial derivative with respect to y (function in two variables)
(Click only once and wait few seconds for the answer!)
Output:htmlPDF
Output:htmlPDF
Output:htmlPDF
Examples: Example 1, Example 2, Example 3, Example 4, Example 5,
Offline version is also available and translators are welcomed .
The project Mathematical Assistant on Web is hosted on sourceforge.net and supported by Grant 99/2008 of FRVŠ.
Free high quality math tests for students to practice curriculum. Easy, friendly, modern. Try it. High recommended. Click the image below.

Semiautomatic multiplication and vampire numbers on Diehl KR 15.

The closest dates which can be permuted into a vampire number are April 4 and May 5 2016. These days give digits for three vampire numbers. One of them even with two pairs of fangs. The last day this year which can be permuted into a vampire number is just Xmass :).

The rest of the Youtube chanel.

Warning. Did you try the problem by yourself first? Blind rewriting problem to computer and puting down the answer may have serious negative influence on your education. The optimal way how to use this application is to solve the problem and then check your result against computer generated answer.

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